Zone Pool "2-ways to the end goal"
I use the deck as Billy Bob suggests too. However, I just use one card a day. I then find two ways to get the cue ball into the zone it requests. That way I have learned an alternate route and can get proficient at both paths. I shoot these until I make 5 in a row.
I also use this as my focus and routine builder. If you learn to really get your pre-shot routine down and learn to do it before every shot, they all start to feel much more comfortable. So, since I use it as a quick drill type of thing, it makes you really bare down on each shot. It is amazing how tough it is to really put the same follow through on the shot and find some real consistency on speed and hitting the exact same spot on the object ball to get the same result. BTW, if I can't do five in a row within a decent amount of time, I do that card again the next day until I get it down.